US4926925A - Pouring apparatus for moving-mold type continuous casting machine - Google Patents

Pouring apparatus for moving-mold type continuous casting machine Download PDF

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Publication number
US4926925A
US4926925A US07/352,862 US35286289A US4926925A US 4926925 A US4926925 A US 4926925A US 35286289 A US35286289 A US 35286289A US 4926925 A US4926925 A US 4926925A
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US
United States
Prior art keywords
tundish
nozzle
tundish nozzle
block molds
mold
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/352,862
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English (en)
Inventor
Shuzo Takahashi
Yutaka Tsuchida
Shiro Osada
Nobuhisa Hasebe
Masayuki Nakada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHI Corp
JFE Engineering Corp
Original Assignee
IHI Corp
Nippon Kokan Ltd
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Application filed by IHI Corp, Nippon Kokan Ltd filed Critical IHI Corp
Assigned to NIPPON KOKAN KABUSHIKI KAISHA, ISHIKAWAJIMA-HARIMA JUKOGYO KABUSHIKI KAISHA reassignment NIPPON KOKAN KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HASEBE, NOBUHISA, NAKADA, MASAYUKI, OSADA, SHIRO, TAKAHASHI, SHUZO, TSUCHIDA, YUTAKA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/064—Accessories therefor for supplying molten metal

Definitions

  • the present invention relates to a pouring apparatus for a moving-mold type continuous casting machine.
  • FIG. 1 shows a conventional moving-mold type continuous casting machine comprising a plurality of block molds 1 interconnected in the form of a pair of endless mold assemblies 2 and 2'. Such mold assemblies 2 and 2' are disposed one upon another to define a continuous mold cavity between them. While the mold assemblies 2 and 2' are driven by drive wheels 3 and 3' in a direction indicated by arrows 4 and 4', melt is poured into the mold cavity at one side of the cavity through a tundish nozzle 6 extending from a tundish 5 and a cast strand 7 is withdrawn from the other side of the mold cavity as indicated by arrow.
  • a gap between the tundish nozzle 6 in the mold cavity and the block molds 1 defining the mold cavity must be kept at a predetermined small value with a high degree of dimensional accuracy.
  • FIGS. 2-5 conventionally used is a tundish-nozzle aligning system as shown in FIGS. 2-5 in which vertical position as well as nose-up and nose-down of the nozzle can be adjusted by operating handlewheels 45 operatively connected to jacks 44 mounted on a tundish-supporting stand 48.
  • Horizontal position of the nozzle 6 can be adjusted by moving jack stand 49 located below the tundish-supporting stand 48 by operating push bolts 46 and draw bolts 47 as shown in FIG. 4.
  • rotational alignment (inclination in a plane perpendicular to a nozzle axis) of the nozzle can be adjusted by adjusting nuts 53 of specially designed bolts 52 pivotably joined with pivot pins 51 to a car frame 50.
  • tundish-nozzle aligning system is not always effective for keeping the gap between the nozzle and the block molds at a predetermined small value. Because, any vertical deviation of the individual block molds 1 must be absorbed by adjusting the nozzle 6 through manual operation of the handlewheels 45. This is practically impossible, resulting in failure of maintaining the above-described predetermined gap. As a result, the tundish nozzle 6 strongly contacts the molds 1 and is nonuniformly worn or damaged.
  • the present invention was made to substantially overcome the above and other problems encountered in the conventional pouring apparatuses for moving-mold type continuous casting machines and has for its object to properly maintain a predetermined small gap between the tundish nozzle and the block molds all the time, thereby ensuring the safety of the tundish nozzle and the moving molds.
  • the present invention will become more apparent from the following description of a preferred embodiment thereof taken in conjunction with the accompanying drawings.
  • FIG. 1 is a side view of a conventional moving-mold type continuous casting machine
  • FIG. 2 is a side view used to explain one example of nozzle aligning system
  • FIG. 3 is a view looking in the direction indicated by the arrow III of FIG. 2;
  • FIG. 4 is a view taken along the line IV--IV of FIG. 2;
  • FIG. 5 is a view taken along the line V--V of FIG. 2;
  • FIG. 6 is a side view of a preferred embodiment of the present invention.
  • FIG. 7 is a view taken along the line VII--VII of FIG. 6;
  • FIG. 8 is a block diagram illustrating a hydraulic-cylinder driving system
  • FIG. 9 is a graph illustrating the relation between position-sensor output and time.
  • a tundish 13 having a short melt outlet 12 is mounted on a tundish car frame 11 comprising a tundish support 8 and a water-cooled jacket 10 with cooling water passages 9.
  • An intermediate member 14 is securely attached to the car frame 11 with joint means 15 such as bolts in coaxial relationship with the axis of the melt outlet 12.
  • the intermediate member 14 is made of a refractory material and has an axially extending melt pouring hole 17 which is coaxially joined to a melt pouring hole 16 of the melt outlet 12.
  • An end of the member 14 away from the outlet 12 is formed with a semispherical recess 19.
  • a tundish nozzle 21 is made of a refractory material, surrounded by a steel shell 20 and has an axially extending melt hole 18 in coaxial relationship with the melt hole 17.
  • a spherical projection 22 adapted to snugly fit into the semispherical recess 19 is formed at the base end of the tundish nozzle 21.
  • Supporting brackets 24 each having a through hole 23 are securely attached to the upper and lower surfaces of the tundish nozzle 21.
  • a guide rod 25 which is pivoted at its one end with a horizontally extending pin 40 to the tundish car frame 11 is slidably inserted into the through hole 23 of the bracket 24.
  • the other end of the guide rod 25 carries spring means 26 such as a compression spring so as to normally bias the supporting bracket 24 toward the tundish car frame 11, whereby the tundish nozzle 21 is pressed against the intermediate member 14.
  • spring means 26 such as a compression spring so as to normally bias the supporting bracket 24 toward the tundish car frame 11, whereby the tundish nozzle 21 is pressed against the intermediate member 14.
  • a hydraulic cylinder 27 is pivoted at its base end to the tundish car frame 11 with a pin 41 which is in parallel with the pin 40.
  • a rod 28 of the hydraulic cylinder 27 is pivoted at its leading end to the lower surface of the tundish nozzle 21 with a pin 42 which is in parallel with the pin 41 so that when the rod 28 is extended or retracted, the tundish nozzle 21 is tilted.
  • position sensors 29 and 29' such as eddy-current position sensors are securely fixed at the centers or midpoints of brackets 31 and 31' extending in the widthwise direction of the block molds 1 and bridging supporting columns 30 (see FIG. 7) so as to measure distances L and L' from the surfaces of the passing block molds 1.
  • outputs of the position sensors 29 and 29' are delivered to a control device generally indicated by reference numeral 32 and the results of the arithmetic operations executed by the control device 32 are delivered to a servo valve 37 for driving the hydraulic cylinder 27.
  • the control device 32 comprises A/D converters 33 and 33', arithmetic units 34 and 34', a comparator 35 and a D/A converter 36.
  • Reference numeral 38 designates a tank; and 39, a pump.
  • gap ⁇ c and ⁇ c' between the leading end of the tundish nozzle 21 and the opposing block molds 1 corresponding to distance l 2 and l 2 ', respectively, at the intermediate points Y of the block molds 1 are actually measured and the data thus obtained are inputted into the arithmetic units 34 and 34' in the control device 32.
  • distance L and L' measured by the position sensors 29 and 29' located at the inlet of the mold cavity defined by the block molds 1 are converted by the A/D converters 33 and 33' into digital signals which in turn are delivered to the arithmetic units 34 and 34' where distances l 2 and l 2 ' at the midpoints Y of the block molds 1 are picked up on the basis of the moving velocity of the block molds 1 and gaps ⁇ c and ⁇ c' between the leading end of the tundish nozzle 21 and the opposing block molds 1 are obtained by arithmetic operation on the basis of the data obtained in trial operation.
  • Signals representative of gaps ⁇ c and ⁇ c' thus obtained are delivered to the comparator 35 after lapse of time of the block molds 1 having reached the leading end of the tundish nozzle 21 so that difference between gaps ⁇ c and ⁇ c', i.e., deflection of the leading end of the tundish nozzle 21 toward the upper or lower block mold 1 is obtained.
  • the difference signal thus obtained is converted by the D/A converter 36 into an analog signal which in turn is delivered to the servo valve 37 as signal for driving the hydraulic cylinder 27.
  • the servo valve 37 is driven to extend or retract the rod of the hydraulic cylinder 27 by a distance so that the tundish nozzle 21 is tilted or inclined about the portions 19 and 22, whereby gaps between the leading end of the tundish nozzle 21 and the opposing block molds 1 can be maintained substantially uniform to prevent the forcible contact of the leading end of the tundish nozzle 21 against the upper or lower block mold 1 which may otherwise result in local wear or breakdown of the leading end of the tundish nozzle 21.
  • Tilting movement of the tundish nozzle 21 due to extension or retraction of the rod of the hydraulic cylinder 27 does not result in leakage of melt from a connection of the nozzle 21 since the nozzle 21 is urged onto the intermediate member 14 by the spring means 26. Even when some deformation is caused to incline the axis of the melt outlet 12 of the tundish 13 with respect to the axis of the tundish nozzle 21, leakage of melt from the connection of the nozzle is prevented since no gap is produced thereat by interaction of the semispherical and spherical surfaces 19 and 22.
  • a plurality of position sensors 29 and 29' may be arranged in spaced apart relationship in the widthwise direction of the block mold 1 so that when the tilt of the leading end of the tundish nozzle 21 is controlled in response to a mean value of outputs from the position sensors arranged in the widthwise direction of the mold 1, any inclination in the widthwise direction of the block mold 1 and any surface roughness of the block molds 1 do not adversely affect the positioning of the leading end of the tundish nozzle 21.
  • gaps between the leading end of the tundish nozzle and the upper and lower opposing block molds can be always uniformly and properly maintained so that the local wear and breakdown of the tundish nozzle can be prevented and therefore the safety can be enhanced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
US07/352,862 1988-06-08 1989-05-17 Pouring apparatus for moving-mold type continuous casting machine Expired - Fee Related US4926925A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP63-141350 1988-06-08
JP63141350A JPH01309761A (ja) 1988-06-08 1988-06-08 移動鋳型式連続鋳造機の注湯装置

Publications (1)

Publication Number Publication Date
US4926925A true US4926925A (en) 1990-05-22

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ID=15289926

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US07/352,862 Expired - Fee Related US4926925A (en) 1988-06-08 1989-05-17 Pouring apparatus for moving-mold type continuous casting machine

Country Status (6)

Country Link
US (1) US4926925A (de)
EP (1) EP0346076B1 (de)
JP (1) JPH01309761A (de)
KR (1) KR900000144A (de)
BR (1) BR8902704A (de)
DE (1) DE68902691T2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5086827A (en) * 1990-12-06 1992-02-11 Hazelett Strip-Casting Corporation Method and apparatus for sensing the condition of casting belt and belt coating in a continuous metal casting machine
US5755274A (en) * 1993-05-18 1998-05-26 Pechiney Rhenalu Strip casting plant for metals
US20060124270A1 (en) * 2002-09-03 2006-06-15 Hans Bebber Method and device for continuously casting metals

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH688507A5 (de) * 1990-02-19 1997-10-31 Pechiney Rhenalu Metallschmelzezufuehrung in einer Bandgiessvorrichtung.
US20060191664A1 (en) * 2005-02-25 2006-08-31 John Sulzer Method of and molten metal feeder for continuous casting

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4544018A (en) * 1983-03-26 1985-10-01 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Feeding device for introducing molten steel into twin-belt casters and mode of operation of such a feed device
JPS60234750A (ja) * 1984-04-21 1985-11-21 フリード・クルツプ・ゲゼルシヤフト・ミツト・ベシユレンクテルハフツング ツインベルト型鋳造機へ溶湯を装入するための供給装置
JPS60249776A (ja) * 1985-01-17 1985-12-10 Noritsu Co Ltd ガス比例弁
JPS62183959A (ja) * 1986-02-05 1987-08-12 Sumitomo Metal Ind Ltd 溶融金属容器の内張酸化防止方法
US4830089A (en) * 1988-05-05 1989-05-16 Hazelett Strip-Casting Corporation Method and apparatus for setting precise nozzle/belt and nozzle/edge dam block gaps

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191501528A (en) * 1914-05-16 1916-01-31 Grenville Mellen Method of and Apparatus for Continuous Casting.
JPS5524722A (en) * 1978-08-10 1980-02-22 Nippon Steel Corp Continuous casting machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4544018A (en) * 1983-03-26 1985-10-01 Fried. Krupp Gesellschaft Mit Beschrankter Haftung Feeding device for introducing molten steel into twin-belt casters and mode of operation of such a feed device
JPS60234750A (ja) * 1984-04-21 1985-11-21 フリード・クルツプ・ゲゼルシヤフト・ミツト・ベシユレンクテルハフツング ツインベルト型鋳造機へ溶湯を装入するための供給装置
JPS60249776A (ja) * 1985-01-17 1985-12-10 Noritsu Co Ltd ガス比例弁
JPS62183959A (ja) * 1986-02-05 1987-08-12 Sumitomo Metal Ind Ltd 溶融金属容器の内張酸化防止方法
US4830089A (en) * 1988-05-05 1989-05-16 Hazelett Strip-Casting Corporation Method and apparatus for setting precise nozzle/belt and nozzle/edge dam block gaps

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5086827A (en) * 1990-12-06 1992-02-11 Hazelett Strip-Casting Corporation Method and apparatus for sensing the condition of casting belt and belt coating in a continuous metal casting machine
US5755274A (en) * 1993-05-18 1998-05-26 Pechiney Rhenalu Strip casting plant for metals
US20060124270A1 (en) * 2002-09-03 2006-06-15 Hans Bebber Method and device for continuously casting metals

Also Published As

Publication number Publication date
JPH01309761A (ja) 1989-12-14
DE68902691D1 (de) 1992-10-08
DE68902691T2 (de) 1993-01-28
EP0346076A1 (de) 1989-12-13
BR8902704A (pt) 1990-01-23
JPH0525582B2 (de) 1993-04-13
KR900000144A (ko) 1990-01-30
EP0346076B1 (de) 1992-09-02

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Owner name: ISHIKAWAJIMA-HARIMA JUKOGYO KABUSHIKI KAISHA, NO.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:TAKAHASHI, SHUZO;TSUCHIDA, YUTAKA;OSADA, SHIRO;AND OTHERS;REEL/FRAME:005083/0917

Effective date: 19890508

Owner name: NIPPON KOKAN KABUSHIKI KAISHA, NO. 1-2, MARUNOUCHI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:TAKAHASHI, SHUZO;TSUCHIDA, YUTAKA;OSADA, SHIRO;AND OTHERS;REEL/FRAME:005083/0917

Effective date: 19890508

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LAPS Lapse for failure to pay maintenance fees
FP Expired due to failure to pay maintenance fee

Effective date: 19940522

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362